Gall Stone

Hi, my 7yr old daughter was in hospital last week with intense pain, she had a blood test that revealed her liver function was normal but she had an enzyme which was elevated, She had an ultrasound scan last week which diagnosed that she had a small gallstone. As you can imagine I was horrified and relieved to discover there was a reason to all the pain she had experienced the week before. She will have to go back for another scan in 6 weeks time. The doc said it may pass through but they need to see whether it will have increased in size and whether she will need surgery. I am very alarmed at this. Also her father is a carrier of Alpha 1 Antitrypsin? What I really want to know is, what could have caused this, how can I relieve her pain if it comes back, I'm frightened to death as it was awful and I felt so helpless. Is this connected with the Alpha 1? Is there anything I can do for her. Please help, the doctors didn't explain things properly to me and I was so worried I forgot to ask questions.

Thanks
Foogirl